(19)
(11) EP 0 307 823 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
16.05.1990 Bulletin 1990/20

(43) Date of publication A2:
22.03.1989 Bulletin 1989/12

(21) Application number: 88114796.1

(22) Date of filing: 09.09.1988
(51) International Patent Classification (IPC)4: B23C 3/34, B23B 29/03, B23B 51/00
(84) Designated Contracting States:
GB IT SE

(30) Priority: 17.09.1987 US 97971

(71) Applicant: VALENITE INC.
Troy Michigan 48007-3950 (US)

(72) Inventors:
  • Beck, Hans W.
    D-6920 Sinsheim 3 (DE)
  • Nikstat, Siegmar
    D-6920 Sinsheim (DE)

(74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät 
Maximilianstrasse 58
80538 München
80538 München (DE)


(56) References cited: : 
   
       


    (54) A bottle boring milling tool


    (57) A tool for a numerically controlled machine used for machining a enlarged profiled bore in a workpiece comprises a boring bar (10) rotatable and axially displaceable relative to the workpiece (11) and a milling cutter (16) rotatably mounted in the boring bar (10). The milling cutter (16) is radially movable relative to the boring bar such that the cutting edges of the milling cutter may be advanced both radially and axially along a pair of NC axes. The milling cutter is adapted to follow a predetermined contour during removal of the boring bar from the workpiece thereby to form a correspondingly profiled bore.







    Search report